The white version of the iPhone 4 happens to be 200 microns thicker than the black version of the device, and it looks as if the difference is entirely due to the front fascia of the handset according to detailed analysis performed by TiPb.
The blog used an electronic caliper to precisely measure the difference in thickness between the two smartphones and added that most cases (at least those they've tested) should still fit.
The front fascia, which supports the Retina display, the Corning Gorilla glass as well as the associated touchscreen components, appears to be at least 50 per cent thicker than the black version.
The real issue here is what might have caused the difference in thickness and whether it will affect future versions of the iPhone, starting with the iPhone 5.
Could it be that Apple is adding several coatings of lacquer to the white version of the phone? If so, how does it affect the phone's functionality?
Another very important issue is why the white iPhone 4 has been so difficult to make, having been launched 10 months after the debut of the latest iPhone, while other white iPhone models (like the 3GS) did not face any significant issues.
The white version of the iPhone 4 is expected to sell exceedingly well, prompting rumours that it could be the perfect bridging product for Apple should the iPhone 5 get delayed.